/* * Copyright 2012 Anton Tananaev (anton.tananaev@gmail.com) * Luis Parada (luis.parada@gmail.com) * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.traccar.protocol; import java.util.Calendar; import java.util.TimeZone; import java.util.regex.Matcher; import java.util.regex.Pattern; import org.jboss.netty.channel.Channel; import org.jboss.netty.channel.ChannelHandlerContext; import org.traccar.BaseProtocolDecoder; import org.traccar.ServerManager; import org.traccar.helper.Log; import org.traccar.model.Position; /** * PT502 tracker protocol decoder */ public class Pt502ProtocolDecoder extends BaseProtocolDecoder { /** * Initialize */ public Pt502ProtocolDecoder(ServerManager serverManager) { super(serverManager); } /** * Regular expressions pattern */ //$POS,6094,205523.000,A,1013.6223,N,06728.4248,W,0.0,99.3,011112,,,A/00000,00000/0/23895000// static private Pattern pattern = Pattern.compile( "\\$POS," + // Data Frame start "(\\d+)," + // Id "(\\d{2})(\\d{2})(\\d{2})\\.(\\d{3})," + // Time (HHMMSS.SSS) "([AV])," + // Validity "(\\d{2})(\\d{2}\\.\\d{4})," + // Latitude (DDMM.MMMM) "([NS])," + "(\\d{3})(\\d{2}\\.\\d{4})," + // Longitude (DDDMM.MMMM) "([EW])," + "(\\d+\\.\\d+)?," + // Speed "(\\d+\\.\\d+)?," + // Course "(\\d{2})(\\d{2})(\\d{2})," + // Date ".*"); /* * Decode message */ protected Object decode( ChannelHandlerContext ctx, Channel channel, Object msg) throws Exception { String sentence = (String) msg; // Parse message Matcher parser = pattern.matcher(sentence); if (!parser.matches()) { Log.info("Parsing error"); return null; } // Create new position Position position = new Position(); StringBuilder extendedInfo = new StringBuilder("pt502"); Integer index = 1; // Get device by IMEI String id = parser.group(index++); try { position.setDeviceId(getDataManager().getDeviceByImei(id).getId()); } catch(Exception error) { Log.warning("Unknown device - " + id); return null; } // Time Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC")); time.clear(); time.set(Calendar.HOUR, Integer.valueOf(parser.group(index++))); time.set(Calendar.MINUTE, Integer.valueOf(parser.group(index++))); time.set(Calendar.SECOND, Integer.valueOf(parser.group(index++))); time.set(Calendar.MILLISECOND, Integer.valueOf(parser.group(index++))); // Validity position.setValid(parser.group(index++).compareTo("A") == 0 ? true : false); // Latitude Double latitude = Double.valueOf(parser.group(index++)); latitude += Double.valueOf(parser.group(index++)) / 60; if (parser.group(index++).compareTo("S") == 0) { latitude = -latitude; } position.setLatitude(latitude); // Longitude Double lonlitude = Double.valueOf(parser.group(index++)); lonlitude += Double.valueOf(parser.group(index++)) / 60; if (parser.group(index++).compareTo("W") == 0) { lonlitude = -lonlitude; } position.setLongitude(lonlitude); // Altitude position.setAltitude(0.0); // Speed String speed = parser.group(index++); if (speed != null) { position.setSpeed(Double.valueOf(speed)); } else { position.setSpeed(0.0); } // Course String course = parser.group(index++); if (course != null) { position.setCourse(Double.valueOf(course)); } else { position.setCourse(0.0); } // Date time.set(Calendar.DAY_OF_MONTH, Integer.valueOf(parser.group(index++))); time.set(Calendar.MONTH, Integer.valueOf(parser.group(index++)) - 1); time.set(Calendar.YEAR, 2000 + Integer.valueOf(parser.group(index++))); position.setTime(time.getTime()); // Extended info position.setExtendedInfo(extendedInfo.toString()); return position; } }